238 lines
7.1 KiB
C
238 lines
7.1 KiB
C
/*
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* r8a7791 clock framework support
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*
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* Copyright (C) 2013 Renesas Electronics Corporation
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* Copyright (C) 2013 Renesas Solutions Corp.
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* Copyright (C) 2013 Magnus Damm
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/sh_clk.h>
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#include <linux/clkdev.h>
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#include <mach/clock.h>
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#include <mach/common.h>
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/*
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* MD EXTAL PLL0 PLL1 PLL3
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* 14 13 19 (MHz) *1 *1
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*---------------------------------------------------
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* 0 0 0 15 x 1 x172/2 x208/2 x106
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* 0 0 1 15 x 1 x172/2 x208/2 x88
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* 0 1 0 20 x 1 x130/2 x156/2 x80
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* 0 1 1 20 x 1 x130/2 x156/2 x66
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* 1 0 0 26 / 2 x200/2 x240/2 x122
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* 1 0 1 26 / 2 x200/2 x240/2 x102
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* 1 1 0 30 / 2 x172/2 x208/2 x106
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* 1 1 1 30 / 2 x172/2 x208/2 x88
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*
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* *1 : Table 7.6 indicates VCO ouput (PLLx = VCO/2)
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* see "p1 / 2" on R8A7791_CLOCK_ROOT() below
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*/
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#define MD(nr) (1 << nr)
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#define CPG_BASE 0xe6150000
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#define CPG_LEN 0x1000
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#define SMSTPCR0 0xE6150130
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#define SMSTPCR1 0xE6150134
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#define SMSTPCR2 0xe6150138
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#define SMSTPCR3 0xE615013C
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#define SMSTPCR5 0xE6150144
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#define SMSTPCR7 0xe615014c
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#define SMSTPCR8 0xE6150990
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#define SMSTPCR9 0xE6150994
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#define SMSTPCR10 0xE6150998
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#define SMSTPCR11 0xE615099C
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#define MODEMR 0xE6160060
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#define SDCKCR 0xE6150074
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#define SD2CKCR 0xE6150078
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#define SD3CKCR 0xE615007C
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#define MMC0CKCR 0xE6150240
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#define MMC1CKCR 0xE6150244
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#define SSPCKCR 0xE6150248
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#define SSPRSCKCR 0xE615024C
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static struct clk_mapping cpg_mapping = {
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.phys = CPG_BASE,
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.len = CPG_LEN,
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};
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static struct clk extal_clk = {
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/* .rate will be updated on r8a7791_clock_init() */
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.mapping = &cpg_mapping,
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};
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static struct sh_clk_ops followparent_clk_ops = {
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.recalc = followparent_recalc,
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};
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static struct clk main_clk = {
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/* .parent will be set r8a73a4_clock_init */
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.ops = &followparent_clk_ops,
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};
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/*
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* clock ratio of these clock will be updated
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* on r8a7791_clock_init()
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*/
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SH_FIXED_RATIO_CLK_SET(pll1_clk, main_clk, 1, 1);
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SH_FIXED_RATIO_CLK_SET(pll3_clk, main_clk, 1, 1);
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/* fixed ratio clock */
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SH_FIXED_RATIO_CLK_SET(extal_div2_clk, extal_clk, 1, 2);
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SH_FIXED_RATIO_CLK_SET(cp_clk, extal_clk, 1, 2);
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SH_FIXED_RATIO_CLK_SET(pll1_div2_clk, pll1_clk, 1, 2);
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SH_FIXED_RATIO_CLK_SET(hp_clk, pll1_clk, 1, 12);
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SH_FIXED_RATIO_CLK_SET(p_clk, pll1_clk, 1, 24);
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SH_FIXED_RATIO_CLK_SET(rclk_clk, pll1_clk, 1, (48 * 1024));
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SH_FIXED_RATIO_CLK_SET(mp_clk, pll1_div2_clk, 1, 15);
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static struct clk *main_clks[] = {
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&extal_clk,
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&extal_div2_clk,
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&main_clk,
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&pll1_clk,
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&pll1_div2_clk,
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&pll3_clk,
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&hp_clk,
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&p_clk,
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&rclk_clk,
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&mp_clk,
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&cp_clk,
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};
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/* MSTP */
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enum {
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MSTP721, MSTP720,
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MSTP719, MSTP718, MSTP715, MSTP714,
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MSTP216, MSTP207, MSTP206,
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MSTP204, MSTP203, MSTP202, MSTP1105, MSTP1106, MSTP1107,
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MSTP124,
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MSTP_NR
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};
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static struct clk mstp_clks[MSTP_NR] = {
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[MSTP721] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 21, 0), /* SCIF0 */
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[MSTP720] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 20, 0), /* SCIF1 */
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[MSTP719] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 19, 0), /* SCIF2 */
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[MSTP718] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 18, 0), /* SCIF3 */
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[MSTP715] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 15, 0), /* SCIF4 */
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[MSTP714] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 14, 0), /* SCIF5 */
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[MSTP216] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 16, 0), /* SCIFB2 */
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[MSTP207] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 7, 0), /* SCIFB1 */
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[MSTP206] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 6, 0), /* SCIFB0 */
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[MSTP204] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 4, 0), /* SCIFA0 */
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[MSTP203] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 3, 0), /* SCIFA1 */
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[MSTP202] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 2, 0), /* SCIFA2 */
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[MSTP1105] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 5, 0), /* SCIFA3 */
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[MSTP1106] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 6, 0), /* SCIFA4 */
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[MSTP1107] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 7, 0), /* SCIFA5 */
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[MSTP124] = SH_CLK_MSTP32(&rclk_clk, SMSTPCR1, 24, 0), /* CMT0 */
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};
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static struct clk_lookup lookups[] = {
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/* main clocks */
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CLKDEV_CON_ID("extal", &extal_clk),
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CLKDEV_CON_ID("extal_div2", &extal_div2_clk),
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CLKDEV_CON_ID("main", &main_clk),
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CLKDEV_CON_ID("pll1", &pll1_clk),
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CLKDEV_CON_ID("pll1_div2", &pll1_div2_clk),
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CLKDEV_CON_ID("pll3", &pll3_clk),
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CLKDEV_CON_ID("hp", &hp_clk),
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CLKDEV_CON_ID("p", &p_clk),
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CLKDEV_CON_ID("rclk", &rclk_clk),
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CLKDEV_CON_ID("mp", &mp_clk),
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CLKDEV_CON_ID("cp", &cp_clk),
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CLKDEV_CON_ID("peripheral_clk", &hp_clk),
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/* MSTP */
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CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
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CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
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CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]), /* SCIFB0 */
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CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]), /* SCIFB1 */
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CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]), /* SCIFB2 */
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CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP202]), /* SCIFA2 */
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CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP721]), /* SCIF0 */
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CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]), /* SCIF1 */
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CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP719]), /* SCIF2 */
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CLKDEV_DEV_ID("sh-sci.9", &mstp_clks[MSTP718]), /* SCIF3 */
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CLKDEV_DEV_ID("sh-sci.10", &mstp_clks[MSTP715]), /* SCIF4 */
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CLKDEV_DEV_ID("sh-sci.11", &mstp_clks[MSTP714]), /* SCIF5 */
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CLKDEV_DEV_ID("sh-sci.12", &mstp_clks[MSTP1105]), /* SCIFA3 */
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CLKDEV_DEV_ID("sh-sci.13", &mstp_clks[MSTP1106]), /* SCIFA4 */
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CLKDEV_DEV_ID("sh-sci.14", &mstp_clks[MSTP1107]), /* SCIFA5 */
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CLKDEV_DEV_ID("sh_cmt.0", &mstp_clks[MSTP124]),
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};
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#define R8A7791_CLOCK_ROOT(e, m, p0, p1, p30, p31) \
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extal_clk.rate = e * 1000 * 1000; \
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main_clk.parent = m; \
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SH_CLK_SET_RATIO(&pll1_clk_ratio, p1 / 2, 1); \
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if (mode & MD(19)) \
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SH_CLK_SET_RATIO(&pll3_clk_ratio, p31, 1); \
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else \
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SH_CLK_SET_RATIO(&pll3_clk_ratio, p30, 1)
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void __init r8a7791_clock_init(void)
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{
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void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
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u32 mode;
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int k, ret = 0;
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BUG_ON(!modemr);
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mode = ioread32(modemr);
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iounmap(modemr);
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switch (mode & (MD(14) | MD(13))) {
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case 0:
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R8A7791_CLOCK_ROOT(15, &extal_clk, 172, 208, 106, 88);
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break;
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case MD(13):
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R8A7791_CLOCK_ROOT(20, &extal_clk, 130, 156, 80, 66);
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break;
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case MD(14):
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R8A7791_CLOCK_ROOT(26, &extal_div2_clk, 200, 240, 122, 102);
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break;
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case MD(13) | MD(14):
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R8A7791_CLOCK_ROOT(30, &extal_div2_clk, 172, 208, 106, 88);
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break;
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}
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for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
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ret = clk_register(main_clks[k]);
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if (!ret)
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ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
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clkdev_add_table(lookups, ARRAY_SIZE(lookups));
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if (!ret)
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shmobile_clk_init();
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else
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goto epanic;
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return;
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epanic:
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panic("failed to setup r8a7791 clocks\n");
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}
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